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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
    9:  *
   10:  * This software is licensed as described in the file COPYING, which
   11:  * you should have received as part of this distribution. The terms
   12:  * are also available at https://curl.haxx.se/docs/copyright.html.
   13:  *
   14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   15:  * copies of the Software, and permit persons to whom the Software is
   16:  * furnished to do so, under the terms of the COPYING file.
   17:  *
   18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   19:  * KIND, either express or implied.
   20:  *
   21:  ***************************************************************************/
   22: #include "test.h"
   23: 
   24: #include "testutil.h"
   25: #include "warnless.h"
   26: #include "memdebug.h"
   27: 
   28: #define TEST_HANG_TIMEOUT 60 * 1000
   29: 
   30: static char const testData[] = ".abc\0xyz";
   31: static off_t const testDataSize = sizeof(testData) - 1;
   32: 
   33: int test(char *URL)
   34: {
   35:   CURL *easy;
   36:   CURLM *multi_handle;
   37:   int still_running; /* keep number of running handles */
   38:   CURLMsg *msg; /* for picking up messages with the transfer status */
   39:   int msgs_left; /* how many messages are left */
   40:   int res = CURLE_OK;
   41: 
   42:   start_test_timing();
   43: 
   44:   global_init(CURL_GLOBAL_ALL);
   45: 
   46:   /* Allocate one CURL handle per transfer */
   47:   easy = curl_easy_init();
   48: 
   49:   /* init a multi stack */
   50:   multi_handle = curl_multi_init();
   51: 
   52:   /* add the individual transfer */
   53:   curl_multi_add_handle(multi_handle, easy);
   54: 
   55:   /* set the options (I left out a few, you'll get the point anyway) */
   56:   curl_easy_setopt(easy, CURLOPT_URL, URL);
   57:   curl_easy_setopt(easy, CURLOPT_POSTFIELDSIZE_LARGE,
   58:                    (curl_off_t)testDataSize);
   59:   curl_easy_setopt(easy, CURLOPT_POSTFIELDS, testData);
   60: 
   61:   /* we start some action by calling perform right away */
   62:   curl_multi_perform(multi_handle, &still_running);
   63: 
   64:   abort_on_test_timeout();
   65: 
   66:   do {
   67:     struct timeval timeout;
   68:     int rc; /* select() return code */
   69:     CURLMcode mc; /* curl_multi_fdset() return code */
   70: 
   71:     fd_set fdread;
   72:     fd_set fdwrite;
   73:     fd_set fdexcep;
   74:     int maxfd = -1;
   75: 
   76:     long curl_timeo = -1;
   77: 
   78:     FD_ZERO(&fdread);
   79:     FD_ZERO(&fdwrite);
   80:     FD_ZERO(&fdexcep);
   81: 
   82:     /* set a suitable timeout to play around with */
   83:     timeout.tv_sec = 1;
   84:     timeout.tv_usec = 0;
   85: 
   86:     curl_multi_timeout(multi_handle, &curl_timeo);
   87:     if(curl_timeo >= 0) {
   88:       timeout.tv_sec = curl_timeo / 1000;
   89:       if(timeout.tv_sec > 1)
   90:         timeout.tv_sec = 1;
   91:       else
   92:         timeout.tv_usec = (curl_timeo % 1000) * 1000;
   93:     }
   94: 
   95:     /* get file descriptors from the transfers */
   96:     mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
   97: 
   98:     if(mc != CURLM_OK) {
   99:       fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
  100:       break;
  101:     }
  102: 
  103:     /* On success the value of maxfd is guaranteed to be >= -1. We call
  104:        select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
  105:        no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
  106:        to sleep 100ms, which is the minimum suggested value in the
  107:        curl_multi_fdset() doc. */
  108: 
  109:     if(maxfd == -1) {
  110: #if defined(WIN32) || defined(_WIN32)
  111:       Sleep(100);
  112:       rc = 0;
  113: #else
  114:       /* Portable sleep for platforms other than Windows. */
  115:       struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
  116:       rc = select(0, NULL, NULL, NULL, &wait);
  117: #endif
  118:     }
  119:     else {
  120:       /* Note that on some platforms 'timeout' may be modified by select().
  121:          If you need access to the original value save a copy beforehand. */
  122:       rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
  123:     }
  124: 
  125:     switch(rc) {
  126:     case -1:
  127:       /* select error */
  128:       break;
  129:     case 0: /* timeout */
  130:     default: /* action */
  131:       curl_multi_perform(multi_handle, &still_running);
  132:       break;
  133:     }
  134: 
  135:     abort_on_test_timeout();
  136:   } while(still_running);
  137: 
  138:   /* See how the transfers went */
  139:   do {
  140:     msg = curl_multi_info_read(multi_handle, &msgs_left);
  141:     if(msg && msg->msg == CURLMSG_DONE) {
  142:       printf("HTTP transfer completed with status %d\n", msg->data.result);
  143:       break;
  144:     }
  145: 
  146:     abort_on_test_timeout();
  147:   } while(msg);
  148: 
  149: test_cleanup:
  150:   curl_multi_cleanup(multi_handle);
  151: 
  152:   /* Free the CURL handles */
  153:   curl_easy_cleanup(easy);
  154:   curl_global_cleanup();
  155: 
  156:   return res;
  157: }